Ernst - much appreciated! Eric --- Original Message --- From: Ernst Dinkla <E.Dinkla@...> To: DigitalBlackandWhiteThePrint@yahoogroups.com Subject: Re: [Digital BW] Seurat and Black Only Printing ><html><body> > > ><tt> >Eric Vogel wrote:<BR> ><BR> >>I am curious to know: what are spectral scan and printing methods?<BR> >><BR> >>� <BR> >><BR> ><BR> >Several methods: Measuring the paints with spectrometers and adding that <B= >R> >to the information gathered with advanced digital photography or <BR> >scanning.� Monochrome sensor with several (up to 13)� narrow band= > <BR> >filters to get a better spectral representation of the pigments used in <BR= >> >the painting.<BR> >The printing part is more an abbreviation for what is used in practice: <BR= >> >printing with more hues or what they call N-color systems. For example <BR> >the Epson R800 is a mild version of that, CMYKORGB the practical <BR> >maximum. N-color printing should reduce differences in metamerism <BR> >between the original and the reproduction as the pigments between the <BR> >two are more related in color. I guess there's still metamerism possible <B= >R> >as oil based pigments in paintings behave differently to for example the <B= >R> >water based pigments of inkjet printing. Not to mention the use of toxic <B= >R> >pigments in the past and today's less toxic artificial pigments that <BR> >have to be used.<BR> ><BR> >For musea having the actual digital-spectral information at hand is <BR> >important in relation to restauration and archiving needs.<BR> ><BR> >N-color and multi-spectral art reproduction will give some hits in Google.<= >BR> ><BR> ><a href=3D"http://www.ichim.org/jahia/webdav/site/ichim2004/shared/static/i= >mages/salon%20pro/06_LumieresTechnology_fichier01.pdf">http://www.ichim.org= >/jahia/webdav/site/ichim2004/shared/static/images/salon%20pro/06_LumieresTe= >chnology_fichier01.pdf</a><BR> ><BR> ><a href=3D"http://www.art-si.org/PDFs/Processing/ICOM05_Berns_Seurat.pdf">h= >ttp://www.art-si.org/PDFs/Processing/ICOM05_Berns_Seurat.pdf</a><BR> ><BR> >The last more specific for the Seurat painting and describing the aging <BR= >> >of the pigments and the loss of luminosity as a result. A digital <BR> >reproduction of the original painting like it was when first shown in Paris= >.<BR> ><BR> >Not that I understand all of it :-)<BR> ><BR> >Ernst<BR> ></tt> > > ><!-- |**|begin egp html banner|**| --> > ><br><br> ><tt> >Please visit the Group Homepage to check the Files, and other resources as = >they are often being updated.<BR> ><BR> ><a href=3D"http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint">http= >://groups.yahoo.com/group/DigitalBlackandWhiteThePrint</a><BR> ><BR> >If you wish to receive no emails or just a daily digest, or you wish to uns= >ubscribe, please edit your Membership preferences by visiting this same pag= >e.<BR> ><BR> >Please follow these basic guidelines:<BR> >- As threads develop, trim off excess portions of earlier messages to keep = >them short.<BR> >- Good manners are required at all time. No personal attacks or flames. 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Message
Re: [Digital BW] Seurat and Black Only Printing
2005-08-08 by Eric Vogel